Widget Slider increments in an odd way when it is dragged outside of its bounds when next to another Widget

UE - Editor - UI Systems - Aug 6, 2020

The attached video shows the results of this bug. When two Widgets are next to each other and one of them has sliders, when the sliders are dragged past their bounds they will increment backward so ...

HideCategories metadata does not hide native Component categories when viewing the root actor

UE - Gameplay - Blueprint Editor - Aug 4, 2020

Seems like we are probably just missing a metadata check when drawing the details of the actor instance, and it is only doing the check for drawing ActorComponent details.  ...

Reflection captures cannot capture any ray tracing effects

UE - Graphics Features - Lumen - Aug 4, 2020

Currently, Reflection capture ignore any ray tracing effects. So let'say you want to use only ray tracing shadow but also you want to use reflection captures for reflections instead of ray tracing r ...

Details View loss of expansion state on container changes

UE - Gameplay - Blueprint Editor - Aug 3, 2020

From the UDN post: When the new entry is added, the entire tree gets wiped out as a result of the CDO swap, and when these update methods run it leaves the tree in a default expansion state. (Effect ...

Lightmaps cannot be created correctly when copying Blueprint that has Static Light as Child Actor component on the level

UE - Graphics Features - Lumen - Jul 31, 2020

In this project, BP with Spot Light registered as Child Actor is placed. If we copy and build, the following warning will be displayed. BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_330 'BP_Spotlig ...

Fix primitive uniform buffer validation.

UE - Rendering Architecture - RHI - Jul 31, 2020

GPUScene primitive validation is currently busted and asserts. It looks like there are two problems: 1) NaN's in the entries can cause comparison issues, so a MemCmp would be better. 2) There's a ...

Live Link Face does NOT launch Take Recorder automatically if press red Record button

UE - Virtual Production - IO - LiveLink - Jul 31, 2020

As you can see below, users expect to launch Take Recorder from the Live Link Face app, but it doesn't actually work.When you're ready to record a performance, tap the red Record button in the Liv ...

Launching a specific UDN Project with Vulkan Support enabled crashes launching on Quest

UE - Platform - XR - Jul 30, 2020

When attempting to run the attached Project submitted from UDN, it will crash on launch. If Vulkan support is disabled, the Project will run as expected on Quest. This issue DOES NOT appear to repro ...

Niagara mesh renderers with a volumetric material trigger a handled ensure and are invisible in the scene

UE - Niagara - Jul 29, 2020

Volumetric materials on a Niagara mesh renderer will not appear in the scene and cause a handled ensure.  ...

Fbx exporter does not support component overriden material color

UE - Editor - Content Pipeline - Import and Export - Jul 29, 2020

The fbx exporter should query component material override when exporting a level actor. ...